This page explains how Emma Jiao (USATT# 271481)'s rating went from 1605 to 1563 at the HITTA Weekly League event from 15 Jan 2023. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.